Process and apparatus for obtaining very low temperatures
US4991401A · kind A · utility
1Cited by
8References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Sep 25, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B9/12
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Process and apparatus for obtaining very low temperatures by making use of the endothermic dissolution of 3He in 4He. A mixing box placed in a vacuum enclosure cooled to approximately 2.degree. K. or less receives continuously liquid 3He and 4He via separate conduits. The solution produced is extracted therefrom via a third conduit at a rate such that, bearing in mind the diameter of the conduit, 3He cannot diffuse countercurrentwise in the solution sufficiently to raise appreciably the content of 3He in the liquid 4He introduced and to reduce the dissolution in this 4He of the liquid 3He introduced simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.